ARNF Advanced Research in Natural Fibers, Vol. 2 No. 1 (2020) p. 15-20 Advanced Research in Natural Fibers Journal homepage: www.fazpublishing.com/arnf e-ISSN : 2682-7409 *Corresponding author: izzuddin@uthm.edu.my 2020 FAZ Publishing. All right reserved. Materials Selection Analysis for Vibration Isolator Pads Izzuddin Zaman 1,2* , S Kanna Subramaniyan 3 , Shahmir Hayyan Sanusi 3 , Nor Azali Azmir 3 , Bukhari Manshoor 3 , Amir Khalid 4 1 Mechanical Failure Prevention and Reliability Research Centre, Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia, 86400 Batu Pahat, Johor, MALAYSIA 2 School of Engineering, Mawson Lakes Campus, South Australia 5095, AUSTRALIA 3 Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia, 86400 Batu Pahat, Johor, MALAYSIA 4 Faculty of Engineering Tehnology, Universiti Tun Hussein Onn Malaysia, Pagoh Education Hub, 84600 Panchor, Johor, MALAYSIA *Corresponding Author Email: izzuddin@uthm.edu.my Received 23 February 2020; Accepted 01 April 2020; Available online 30 April 2020 1. Introduction Vibration is the mechanical motions and can be a source of problem which prompts harm and loss of control of equipment, consequently lessening the effectiveness of operation in machines [1]. Every object when vibrate at certain frequency will tend to oscillate with large amplitude. This phenomenon is well known as resonance – where the natural frequency of structure coincides with the excitation frequency. There are two common approaches that have been taken in previous years to eliminate vibration on the structure such as: (1) adding auxiliary mass known as vibration absorber [2-4], and (2) install vibration isolating devices between adjacent subsystems [5]. The later has been a focus in this research study the reduce the harmonic vibration system excited. Vibration isolator pads solve the problems of high frequency vibration, structural sound and machine installation, while eliminating the need for bolt fixing, especially in this case study for stackable washing and dryer machine. These isolator pads have a high coefficient of friction, good aging characteristics, horizontal stability and high load capacity [6]. Vibration isolation pads are also used to support building structures and components, thereby eliminating minor vibration problems on high and low floors. One of the common materials for isolator is Neoprene. Neoprene isolator pads possess the general traits that are characteristic of most elastomers including a large operable temperature range and flexibility. Neoprene is often referred to as "all purpose" synthetic elastomer. Neoprene has many properties and can be used in the widest range of applications, but it is not necessarily suitable for some more specialized Abstract: Isolator pads which also called as vibration pads are used in many applications to isolate vibration, extend machine life, reduce maintenance costs and reduce excessive wear. It is the process of isolating objects such as equipment from harmful vibration sources. In this study, two types of isolator pad materials; neoprene and sorbothone were analyzed in order to be used for stackable washing and dryer machine. In this case, the stackable washing and dryer machine together with the isolator pads were simplified into two degree of freedom system, where the first and the second natural frequencies for each material of isolator pad were determined by using matrix iteration method, in which later were validated by a modern tool such as Matlab. For neoprene material, the first natural frequency obtained was 44.2 rad/s and the second natural frequency is 107.7 rad/s. By contrast, sorbothone material shows slightly higher for both first and second natural frequencies compared to neoprene, which were 57.9 rad/s and 141.0 rad/s respectively. From this result, it shows that neoprene is suitable to be used as the coupling (spring) material since it has lower natural frequency value compared to sorbothone, besides the second natural frequency of sorbothone material is near to the forcing frequency 140 rad/s, thus could amplified the vibration due to resonance. Keywords: Vibration isolator, Neoprene, Sorbothone, Natural frequency, Resonance